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    "正太分布(Normal Distribution)是一个在数学、物理及工程领域都非常重要的概率分布，在统计学的许多方面有着重大的影响力。  \n",
    "\n",
    "正太曲线呈钟型，两头低，中间高，左右对称。  \n",
    "\n",
    "若随机变量X服从一个数学期望为μ、方差为σ^2的正态分布，记为N(μ，σ^2)。其概率密度函数为正态分布的期望值μ决定了其位置，其标准差σ决定了分布的幅度。当μ = 0,σ = 1时的正态分布是标准正态分布。"
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